#main{float:left; width:1000px; height:600px;}
#body{float:left; width:1000px; height:400px; border: solid 1px red;}
#bleft{float:left; width:200px; height:100%; background-color: #ccc;}
#bmiddle{float:left; width:600px; height:100%; background-color: #fff;}
#bright{float:right; width:200px; height:100%; background-color: #ccc;}
